Radiological
Gross Beta / Photon Emitters in your water
Is Gross Beta / Photon Emitters in drinking water dangerous?
It depends on the level and how long you're exposed. The EPA legal limit (MCL) for Gross Beta / Photon Emitters is 50 pCi/L. Meeting the legal limit isn't the same as zero risk — test your water to know your level.
How do you remove Gross Beta / Photon Emitters from water?
Gross Beta / Photon Emitters is treated by Water Softener and Reverse Osmosis. Choose a system independently certified to NSF/ANSI standards to reduce Gross Beta / Photon Emitters, and test your water first to confirm the level.
Source: EPA MCL / MCLG; WHO guidelines; NSF/ANSI · 2026
Health effects
Beta and photon emitters are radioactive contaminants that can come from natural deposits or from nuclear activity. Long-term exposure increases cancer risk. The federal limit is expressed as an annual dose rather than a simple concentration.
The health-based goal vs. the legal limit
The federal legal limit (MCL) is the maximum allowed by law. The health-based goal (EPA MCLG / WHO) is a health target — it is often stricter than the legal limit, and it is not itself a legal limit.
Health-based goal (EPA MCLG / WHO)
No health-based goal set
Federal legal limit (MCL)
50 pCi/L
Source: EPA MCL / MCLG; WHO guidelines · 2026
Not affiliated with or endorsed by EWG.
What removes Gross Beta / Photon Emitters
Ion exchange
Water Softener
Swaps the calcium and magnesium that cause hard water for sodium — so scale stops forming.
Look for: NSF/ANSI 44 certification
How it works→Semipermeable membrane filtration
Reverse Osmosis
Pushes water through a fine membrane that removes the dissolved solids most filters miss.
Look for: NSF/ANSI 58 certification
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Is Gross Beta / Photon Emitters in your water?
Check your city's public record, then book a free 30-minute test to confirm what's in your home.